HR: 1330h
AN: P43A-05    [Abstracts]
TI: A Comparative View of X-rays from the Solar System
AU: * Bhardwaj, A
EM: Anil.Bhardwaj@msfc.nasa.gov
AF: NASA Marshall Space Flight Center, NSSTC/XD12, 320 Sparkman Dr., Huntsville, AL 35805 United States
AU: Elsner, R
EM: ron.elsner@msfc.nasa.gov
AF: NASA Marshall Space Flight Center, NSSTC/XD12, 320 Sparkman Dr., Huntsville, AL 35805 United States
AU: Gladstone, R
EM: randy.gladstone@swri.org
AF: SWRI, 6220 Culebra Rd., San Antonio, TX 78228 United States
AU: Cravens, T
EM: cravens@ku.edu
AF: Univ. Kansas, Dept. Physics & Astronomy, Lawrence, KS 66045 United States
AU: Waite, H
EM: hunterw@umich.edu
AF: Univ. Michigan, AOSS, Ann Arbor, MI 48109 United States
AU: Branduardi-Raymont, G
EM: gbr@mssl.ucl.ac.uk
AF: MSSL, Univ. College London, Dorking, Surrey, RH5 6NT United Kingdom
AU: Ostgaard, N
EM: Nikolai.Ostgaard@ift.uib.no
AF: Univ. Bergen, Physics & Technology, Bergen, N-5007 Norway
AU: Dennerl, K
EM: kod@mpe.mpg.de
AF: MPI fur Extraterrestrische Physik, Giessenbachstrasse, Garching, 85748 Germany
AU: Lisse, C
EM: lisse@astro.umd.edu
AF: Univ. Maryland, Dept. Astronomy, College Park, MD 20742 United States
AU: Kharchenko, V
EM: vkharchenko@cfa.harvard.edu
AF: Harvard-Smithsonian Ctr for Astrophysics, 60 Garden St., Cambridge, MA 02138 United States
AU: Hoekstra, R
EM: hoekstra@kvi.nl
AF: Univ. Groningen, KVI, Atomic Physics, Groningen, NL 9747 AA Netherlands
AU: Beiersdorfer, P
EM: beiersdorfer@llnl.gov
AF: Lawrence Livermore National Lab., Dept. Physics, Livermore, CA 94550 United States
AB: With the advent of sophisticated X-ray observatories, viz., Chandra and XMM-Newton, the field of planetary X-ray astronomy is advancing at a faster pace. Several new solar system objects are now know to shine in X-rays at energies generally below 2 keV. Jupiter, Saturn, and Earth, all three magnetized planets, have been observed by Chandra and XMM-Newton. At Jupiter, both auroral and non-auroral disk X-ray emissions have been observed. The first soft X-ray observation of Earth's aurora by Chandra shows that it is highly variable. X-rays have been detected from Saturn's disk, but no convincing evidence of X-ray aurora has been seen. Several comets have been observed in X-rays by Chandra and XMM-Newton. Cometary X-rays are produced due to change exchange of solar wind ions with cold cometary neutrals. Soft X-rays have also been observed from Venus, Mars, Moon, Io, Europa, Io plasma torus, and heliosphere. The non-auroral X-ray emissions from Jupiter, Saturn, and Earth, and those from sunlit disk of Mars, Venus, and Moon are produced due to scattering of solar X-rays. The spectral characteristics of X-ray emission from comets, heliosphere, darkside of Moon, and Martian halo are quite similar, but they appear to be quite different from those of Jovian auroral X-rays. The X-ray aurora on Earth is generated by electron bremsstrahlung and on Jupiter by precipitation of highly-ionized energetic heavy ions. In this paper we will present a comparative overview of X-ray emission from different solar system objects and make an attempt to synthesize a coherent picture.
DE: 5400 PLANETOLOGY: SOLID SURFACE PLANETS
DE: 5700 PLANETOLOGY: FLUID PLANETS
DE: 6000 PLANETOLOGY: COMETS AND SMALL BODIES
DE: 6200 PLANETOLOGY: SOLAR SYSTEM OBJECTS (New field)
DE: 7554 X rays, gamma rays, and neutrinos
SC: Planetary Sciences [P]
MN: 2005 Joint Assembly